power point 7

# Power point 7 - Three key words:Validity Reliability Bias Classroom demo Think about the measurements and ask questions How were the numbers

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Three key words :Validity, Reliability, Bias Classroom demo

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Think about the measurements and ask questions. How were the numbers produced Exactly what was being measured. Basically ask: “Do the numbers make sense” Classroom example –show article on overhead---1 million hours
Example Alcohol abuse has been described by college presidents as the number one problem on campus and it is an important cause of death in young adults. Information from 17,096 college students Frequent binge drinking---5 or more drinks, 3 or more times in 2 weeks See Excel file

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Establishing Causes using the Data How much of a difference makes a difference – Statistically Significant What is the chance that two treatments are different by a certain amount given the observed data
Now turn our attention to Organizing Data Pie charts, bar graphs, line graphs Copyright, 1996 © Dale Carnegie & Associates,

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We study two types of variables: categorical and quantitative
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## This note was uploaded on 02/11/2010 for the course STAT 113 taught by Professor Mr.deely during the Spring '10 term at Purdue University Calumet.

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Power point 7 - Three key words:Validity Reliability Bias Classroom demo Think about the measurements and ask questions How were the numbers

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